样品在放置期间,待测组分浓度的影响因素是() A.生物因素 B.化学因素 C.生物、 发布时间:2017-05-16 15:32 │ 来源:www.tikuol.com 题型:单项选择题 问题: 样品在放置期间,待测组分浓度的影响因素是()A.生物因素B.化学因素C.生物、化学和物理因素D.生物和物理因素E.物理因素
题型:单项选择题 完成句子。1. He has to learn ________ (收集淡水),hunt for food,and make fire.(how) 2. The lesson we can learn from Chuck and all the others ________ (结交了不同寻常朋友) is that friends are teachers.(unusual) 3. How did these differences come about? There is _________ (没有直截了当的答案) this question.(answer) 4. Businessmen and tourists often come to China ___________ (但不会说) Chinese.(without) 查看答案